JP7370105B1 - food storage containers - Google Patents

Abstract

[Problem] The flange portions at the corners have a good appearance, and even if the opening of the container itself is covered with a top seal film, air flow inside and outside the container can be blocked, and the freshness of stored food can be maintained. [Solution] A plurality of side pieces 3 and 4 continuously formed around a bottom side wall 2 are supported by a cardboard-like material coated with heat sealing ability, and a plurality of side pieces 3 and 4 are provided between adjacent side pieces 3 and 4. The container body 1 is formed by overlapping the side pieces 3 and 4 with the folded piece 5 in between. The side pieces 3 and 4 are formed with flange parts 6 and 7 extending outward from the container body 1, and the flange parts 6 and 7 are overlapped with each other with a flange folding piece 8 provided between the adjacent flange parts 6 and 7 interposed therebetween. They are attached and connected together, and the upper edge of the flange folding piece 8 is positioned inside the flange parts 6 and 7. The flange folding piece 8 is formed to be continuous with the folding piece 5, and the overlapping portion of the flange parts 6 and 7 has a triple part with the flange folding piece 8 and a double part in which only the flange parts 6 and 7 are overlapped. A heavy part is provided. [Selection diagram] Figure 2

Description

The present invention relates to a container made of a cardboard-like material made of a pulp material, such as a tray, a lunch box container, etc., which is folded into a planar rectangular shape with a flange portion made of the cardboard-like material. In case of a case, the flange part at the corner has a good appearance with no drips etc., and even if the opening of the container itself is top-sealed with a thin film material, it prevents air flow inside and outside the container and maintains the freshness of the stored food. The present invention relates to a food storage container that can also be used to store food.

Conventionally, the present inventor has sought to eliminate harmful gases generated during the depreciation process associated with the disposal of food containers made of synthetic resin materials after use, marine pollution caused by pulverization, and various adverse effects on living things. We have been conducting various studies and research into constructing the container itself from pulp materials.

On the other hand, various food containers have been proposed using paper as a material, such as paper container blanks and paper containers disclosed in Patent Document 1, food storage containers disclosed in Patent Document 2, and the like. It is assumed that the paper container of Patent Document 1 is formed so that the narrow passage, which is a gap formed between folded joint plates serving as a peripheral wall, is shifted in the middle thereof. The food storage paper container of Patent Document 2 is a container in which a surrounding wall is formed by folding and pasting fan-shaped pieces provided between side plates around the bottom plate into three, and a rounded piece is attached to the upper edge of the container. Suppose that it is made by fixing .

JP2013-28346A Utility Model Publication No. 55-72614

However, in the paper container of Patent Document 1 mentioned above, it is troublesome to configure the narrow path to be misaligned, and in addition, the flange configuration has a folded portion that is folded in when adjacent flange portions are overlapped, and the width of the folded portion is approximately the same as the width of the flange portion. Therefore, the flange portion as a whole becomes thick and there is a difference in level between it and other parts. For this reason, for example, when covering the opening with a top seal film, the resulting level difference prevents it from adhering tightly, creating airflow inside and outside the container, making it impossible to maintain the freshness of the stored food, so it is necessary to wrap the entire container. .

In the food storage paper container of Patent Document 2, in the surrounding tabs that are overlapped and joined at the four corners, the extensions connected from the edges of the surrounding tabs are sandwiched and overlapped. The joints are thick and create a level difference between them and other parts. Therefore, there is a problem similar to that in Patent Document 1 described above.

Therefore, the present invention was created in view of the existing circumstances as described above, and is a food container formed from a paper material such as a pulp material, in which adjacent side pieces are connected at the corners. Similar to the folding piece that is folded in between the side pieces, the upper edge of the flange folding piece, which is sandwiched and folded in to connect the flange parts, is positioned inside the flange part to prevent leakage from food, etc. stored in the container body. In addition to preventing leakage and staining due to external dripping of liquid components, the flange portions at the corners are reinforced to maintain the shape of the container, and there is no difference in level between the flange portions. To provide a food storage container in which the air flow inside and outside the container is blocked even by a top seal film covering only the opening of the container body, the freshness of the stored food can be maintained, and the use of the film can be reduced.

In order to solve the above problems, in the food storage container of the present invention, a cardboard-like material made of a pulp material and coated with a thermoplastic resin having heat-sealing ability is connected around the bottom side wall 2. Food storage consisting of a container body 1 formed by standing on a plurality of formed side pieces 3 and 4 and overlapping the side pieces 3 and 4 with a folded piece 5 provided between adjacent side pieces 3 and 4 sandwiched therebetween. In the container, the side pieces 3 and 4 are formed with flange parts 6 and 7 extending outward from the container body 1, and the flange parts 6 and 7 are formed with a flange folding piece 8 provided between the adjacent flange parts 6 and 7. The upper edges of the folded pieces 5 are the same between the upper edge of one adjacent side piece 3 (4) and the upper edge of the other side piece 4 (3). The flange folding piece 8 is continuous in the height position, and extends from the upper edge of the folding piece 5 to the outside of the container body 1 in a continuous manner.Both ends of the upper edge of the flange folding piece 8 is located above the upper edge of the side pieces 3, 4 and outside the boundary between the folding piece 5 and the flange folding piece 8, and connects the adjacent flange parts 6, 7 to each other. 6, 7 is characterized in that the entire upper end edge of the flange folding piece 8 is disposed inside the flange portions 6, 7 when they are stacked on top of each other.
In the present invention, the term "pulp material" refers not only to pulp, but also to paper materials including vegetable fiber materials whose main component is pulp, bamboo materials, recycled paper, and others.
The flange folding piece 8 can be formed to be continuous with the folding piece 5.
The overlapping portion of the flange portions 6 and 7 can be configured to include a triple portion where the flange folding piece 8 is provided and a double portion where only the flange portions 6 and 7 are overlapped.
The double portion can be configured to have a width sufficient to allow the top seal film T to be joined.
The upper end edge of the flange folding piece 8 can be configured to be inclined with respect to the boundary with the folding piece 5.

In the food storage container according to the present invention configured as described above, the adjacent side pieces 3 and 4 standing around the bottom wall 2 of the container body 1 are overlapped with the folding piece 5 in between, Adjacent flange parts 6 and 7 are connected by being overlapped with a flange folding piece 8 in between to form a box-shaped container body 1.
The upper end edge of the flange folding piece 8 sandwiched between the overlapping flange parts 6 and 7 is located inside the flange parts 6 and 7, so that the flange folding piece 8 is continuously formed in the folding piece 5. At the same time, liquid components such as meat juice exuding from the food F stored in the container body 1 do not enter the bonded connection area between the flange parts 6 and 7, and do not stain the flange parts 6 and 7.
The triple portion of the flange portions 6, 7 in which the flange folding pieces 8 are overlapped increases the strength of the flange portions 6, 7 themselves, maintains the shape retention of the container body 1, and is joined to the flange portions 6, 7. Also, the top seal film T covering the opening of the container body 1 does not distort the container body 1.
The double portions in the flange portions 6 and 7 reduce the level difference between the top seal film T and the flange portions 6 and 7 around the container body 1 when joining the top seal film T and the flange portions 6 and 7 to be joined. The freshness of the stored food F is maintained by preventing air flow inside and outside the container body 1 without creating a gap between the top surface and the top surface of the container body 1.
The upper end edge of the flange folding piece 8, which is formed to be inclined with respect to the boundary with the folding piece 5, forms a gentle slope in the inner and outer directions of the container body 1 on the mutually upper surfaces of the overlapping flange parts 6 and 7. This strengthens the bonding of the top seal film T.

Since the present invention is constructed as described above, the flange folding piece 8 is sandwiched between the adjacent flange parts 6 and 7 formed outwardly from the side pieces 3 and 4, and the upper end edge of the flange folding piece 8 is By locating them inside the flange portions 6 and 7, it is possible to prevent leakage of liquid components exuded from the food F etc. stored in the container body 1 to the outside and staining. In addition, the top seal film T, which reinforces the flanges 6 and 7 at the corners and prevents the formation of a level difference at the joint between the flanges 6 and 7, and which covers only the opening of the container body 1, also protects the inside and outside of the container. This prevents the air flow and maintains the freshness of the stored food F, and it also has the advantage of greatly reducing the amount of film used compared to the wrapping type that covers the entire container.

In addition, the meat juices and other liquid components exuding from the food F stored in the container body 1 can be absorbed by the overlapping flange parts 6 and 7 sandwiching and pasting the flange folding piece 8, so that the cut end surface of the material can be absorbed by the flange. Since the liquid component is hidden inside the flange parts 6 and 7, the liquid component does not enter the inside of the flange parts 6 and 7, and not only does it not leak to the outside by dripping or the like, but it also does not stain the container itself.

The superimposed flange parts 6 and 7 have a triple part in which the flange folding piece 8 is sandwiched, thereby increasing the strength of the flange parts 6 and 7 themselves, thereby maintaining the shape retention of the container body 1, Even if the opening of a container body 1 is covered with a top seal film T, the container itself is not distorted and the packaging form is maintained well.

In addition, the flange parts 6 and 7 overlapped at the corners are provided with a double part in which only the flange parts 6 and 7 are overlapped, so that the flange parts 6 and 7 are separated from other parts. The difference in level between the container body 1 and the top seal film T, which covers the opening of the container body 1 and is joined to the flange parts 6 and 7, is small, and air flow inside and outside the container body 1 is not generated between the top seal film T, which covers the opening of the container body 1 and is joined to the flange parts 6 and 7. The freshness of F can be maintained.

In addition, the upper edge of the flange folding piece 8 is formed to be inclined with respect to the boundary with the folding piece 5, so that the upper surface of the flange parts 6 and 7, which are overlapped with the flange folding piece 8 sandwiched therebetween, is not visible on the container body 1. Its top surface is smooth in both the inside and outside directions. Therefore, even if the top seal film T is joined to the flange portions 6 and 7, it is smooth, and air flow inside and outside the container can be further blocked.

It should be noted that the reference numerals added in each of the sections ``Means for Solving the Problems'' and ``Effects of the Invention'' are added to facilitate reference to the parts indicating each component described in the drawings. The present invention is not limited to the structure, shape, etc. shown by these descriptions or the symbols in the drawings.

FIG. 1 is a perspective view of an embodiment of the present invention in use. Similarly, (A), (B), (C), (D), and (E) are each developed plan views of folded portions of the container body. It is a sectional view taken along the arrow in FIG. 1 as well.

Hereinafter, one embodiment of the present invention will be described with reference to the drawings. The reference numeral 1 shown in the drawings refers to various products such as fish, meat, vegetables, and side dishes sold at supermarkets, convenience stores, and other stores. This is a container body for storing food F, and is formed, for example, into a box shape by bending and molding a paper material or the like having a predetermined thickness.

The container body 1 itself is made of, for example, a cardboard-like material made of pulp material and coated with a thermoplastic resin having heat-sealing properties. It is constructed by bending the side pieces 3 and 4. That is, by sandwiching and overlapping the folding pieces 5 provided between the side pieces 3 and 4 that are continuous from the side edge of the bottom side wall 2 and adjacent to each other at the four corners in a folded manner, the side pieces 3 and 4 Each is formed into a box shape that stands up from the side edge of the bottom wall 2 at a predetermined angle. As shown in FIG. 2, the folding piece 5 has an upper edge that is at the same height between the upper edge of one side piece 3 (4) and the upper edge of the other side piece 4 (3). When folded between the side pieces 3 and 4, the upper edge of the folded piece 5 overlaps the upper edge of each of the side pieces 3 and 4, and the entire area of the folded piece 5 is It overlaps with the overlapping part of pieces 3 and 4.

The material forming the container body 1 has a heat-sealing ability, so that the folded portions and the like are joined in an overlapping state by heating during folding. Further, when the shape is rectangular when viewed from above, one opposing side is folded in first, and then the other opposing side is folded in.

In addition, when overlapping the adjacent side pieces 3 and 4 with each other, it is possible to join the overlapping portions or to leave them unjoined. Even if they are not joined to simplify the manufacturing process, for example, the side pieces 3 and 4 can be bonded together by overlapping and bonding the adjacent flange parts 6 and 7, as described later. are not separated, and the shape of the container body 1 is maintained.

Flange portions 6 and 7 extending outward from the container body 1 are integrally connected to the upper edges of the surrounding side pieces 3 and 4. The flange portions 6, 7 are formed by folding in a flange folding piece 8 that is continuous from the upper edge of the folding piece 5 that folds the adjacent side pieces 3, 4 together and overlappingly pasting them together. 7 I try to connect them to each other. That is, when the adjacent side pieces 3 and 4 are connected, the flange folding piece 8 that connects the adjacent flange parts 6 and 7 is similarly folded between the adjacent flange parts 6 and 7, thereby forming a flange. The parts 6 and 7 are connected to each other.

Moreover, between the adjacent flange parts 6 and 7, the flange parts 6 and 7 extend toward the outside of the container body 1, so that the outer position of the folded part between the side pieces 3 and 4 is The gaps between certain flange portions 6 and 7 are connected via the flange folding piece 8 as described above . The flange folding piece 8 itself is formed by being continuously arranged and protruding from the upper edge of the folding piece 5 in this gap region so as to extend outward from the container body 1. Like the outer flange parts 6, 7, the entire area is located outside the container body 1 . When the flange folding piece 8 itself is overlapped over the entire area when folded between the adjacent flange parts 6 and 7, the thickness between the flange parts 6 and 7 becomes thick, and a step corresponding to the thickness is created.

In order to avoid this, between the adjacent flange parts 6 and 7 which are overlapped at the folding part, the inner part, which is a part of the outer part of the flange parts 6 and 7 that has been cut off, is inserted into the folded part in the gap part. A flange folding piece 8 is formed to protrude from the upper edge of the piece 5.

As shown in the figure, the entire upper end edge of the flange folding piece 8 is located on the inner side that does not reach the outer edge of the flange parts 6, 7, that is, when the adjacent flange parts 6, 7 are overlapped and attached and connected. It is located inside and hidden. For this reason, the entire area of the flange folding piece 8 from the upper edge of the folding piece 5 that overlaps with the upper edges of the side pieces 3 and 4 is continuously provided to the outside of the container body 1, so that the cut end is inside the container body 1. Since there is no edge, even if the liquid component that may seep out from the food F stored inside the container body 1 reaches the flange parts 6 and 7, it will not reach the upper edge of the internal flange folding piece 8. There is no leakage outside the container.

In FIG. 2(A), one of the upper edges of the flange folding piece 8 is on the inner surface of the flange portion 6 (7) of the side piece 3 (4) that will be on top when the adjacent side pieces 3 and 4 are folded. It is located between the outermost areas. The other side is located above the upper end position of the side piece 4 (3) which will be the bottom when folded, and above the upper edge of the side piece 4 (3) which is the inner side of the flange part 7 (6). It is set on the flange parts 6, 7 side at a position near the boundary between the side pieces 3, 4 and the flange parts 6, 7. The upper end edge has a hypotenuse shape with the upper side piece 3 (4) facing outward with respect to the boundary between the folding piece 5 and the flange folding piece 8.

In FIG. 2(B), one of the upper edges of the flange folding piece 8 is on the inner surface of the flange portion 7 (6) of the side piece 4 (3) which becomes the bottom when the adjacent side pieces 3 and 4 are folded. It is located between the outermost areas. The other side is located above the upper end position of the side piece 3 (4) that will be on top when folded, and above the upper edge of the side piece 3 (4) that is the inner side of the flange portion 6 (7). It is set on the flange parts 6, 7 side at a position near the boundary between the side pieces 3, 4 and the flange parts 6, 7. The upper end edge has a hypotenuse shape with the lower side piece 4(3) facing outward with respect to the boundary between the folding piece 5 and the flange folding piece 8.

In FIG. 2C, the upper edge of the flange folding piece 8 is set to be substantially parallel to the boundary between the folding piece 5 and the flange folding piece 8.

Moreover, in FIG. 2(D), the upper end edge of the flange folding piece 8 is not formed in a straight line shape but in a stepped shape. Whether it is linear or step-shaped can be selected as appropriate, and if it is linear, it is possible to make the upper surface of the upper flange portion 6 (7) even more gentle.

Although not shown, the shape of the upper edge of the flange folding piece 8 may be curved as long as the flange folding piece 8 itself is located inside the flange parts 6 and 7 which are overlapped. It may have a wave-like shape or a wave-like shape.

The position of the upper edge of the flange folding piece 8 is within the middle of the inner surface of the flange parts 6, 7 from the outside, for example, from the inner side of the edge of the flange parts 6, 7 of the side pieces 3, 4. It is located at about 1/3 to 1/2 position. This is an example when the width of the flange parts 6, 7 is, for example, about 4 to 6 mm, and of course, the position of the upper edge of this flange folding piece 8 is determined when the width of the flange parts 6, 7 is wide. may be set outward from the 1/2 position from the inside of the flange portions 6, 7 (see FIG. 2(E)).

By doing this, the inner part of the overlapping flange parts 6 and 7 has a triple structure in which the flange folding piece 8 is sandwiched inside, and the outer part has a double structure with only the flange parts 6 and 7. The flange parts 6, 7 themselves are reinforced by the inner triple part, and the upper surfaces of the overlapped flange parts 6, 7 become gentle from the inside to the outside, so that there is no step.

In addition, in the overlapping flange parts 6 and 7, the width of the above-mentioned double part, that is, the width of the part from the outermost part of the upper edge of the flange folding piece 8 to the outer edge position of the flange parts 6 and 7 is as follows. The width of the opening of the container body 1 is set to be sufficient for attaching a so-called top seal film T to the flange portions 6 and 7. As mentioned above, when the width of the flange parts 6, 7 is narrow, the protrusion size of the flange folding piece 8 from the folding piece 5 should be small, and when the width of the flange parts 6, 7 is wide, The protrusion size of the flange folding piece 8 from the folding piece 5 may be formed to be large if the width of the double portion is secured.

In this way, by sandwiching and joining the flange folding piece 8 between the adjacent flange parts 6 and 7, as described above, the adjacent side pieces 3 and 4 are not joined to each other, and the gap is reduced. However, since the folded piece 5 existing between the side pieces 3 and 4 does not have a cut end surface, even if liquid components from the stored food F seep into the gap, the flange portion 6 , 7 are not contaminated or leaked out of the container body 1.

In addition, in the container formed in this manner, the cardboard-like material formed from the pulp material has the ability to retain the shape of the container body 1 even if container base paper with a wall thickness of about 100 to 120/m ² is used. It was confirmed that the leakage to the outside of the main body 1 was prevented and the adhesion when covered with the top seal film T was also good, and it was possible to contribute to the saving of forming materials. It should be noted that the thickness of the cardboard-like material used as the forming material is not preferable, since even if it is effective for the shape retention of the container, it will create a level difference at the overlapping part of the flange parts 6 and 7. If so, even if the adhesion of the flanges 6 and 7 by the top seal film T can be maintained, the shape retention of the container may not be maintained. is selected.

F...Food T...Top seal film 1...Container body 2...Bottom side wall 3...Side piece 4...Side piece 5...Folding piece 6...Flange part 7...Flange part 8...Flange folding piece

Claims (1)

A cardboard-like material made of pulp material and coated with a thermoplastic resin having heat-sealing properties supports a plurality of side pieces continuous to each other around the bottom side wall, and folds are provided between adjacent side pieces. In a food storage container consisting of a container body formed by overlapping side pieces with two sides in between, the side pieces have a flange extending outward from the container body, and a flange folding piece is provided between adjacent flange parts. The flange portions are overlapped and bonded together by sandwiching the flange portions, and the upper edge of the folding piece is placed at the same height position between the upper edge of one adjacent side piece and the upper edge of the other side piece. The flange folding piece is continuous and extends outward from the container body from the upper edge of the folding piece, and both ends of the upper edge of the flange folding piece are longer than the upper edge of the side piece. In the upper position, it is located outside the boundary between the folding piece and the flange folding piece and connects the adjacent flange parts to each other, and when the adjacent flange parts are overlapped, the entire area of the upper edge of the flange folding piece is A food storage container characterized by being arranged inside a flange part.

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